<template>
   <div>
      <el-card style="margin: 20px 0px">
         <!-- 三级联动 -->
         <CategorySelect @getCategoryId="getCategoryId" :show="scene != 0"></CategorySelect>
      </el-card>
      <el-card>
         <!-- 底部这里将来是有三部分进行切换 -->
         <div v-show="scene == 0">
            <!-- 展示SPU列表的结构 -->
            <el-button type="primary" icon="el-icon-plus" :disabled="!category3Id" @click="addSpu">添加SPU</el-button>
            <el-table style="width: 100%" border :data="records">
               <el-table-column type="index" label="序号" width="80" align="center">
               </el-table-column>
               <el-table-column prop="spuName" label="SPU名称" width="width">
               </el-table-column>
               <el-table-column prop="description" label="SPU描述" width="width">
               </el-table-column>
               <el-table-column prop="prop" label="操作" width="width">
                  <template slot-scope="{ row, $index }">
                     <!-- 这里按钮将来用hintButton替换 -->
                     <hint-button type="success" icon="el-icon-plus" size="mini" title="添加sku"
                        @click="addSku(row)"></hint-button>
                     <hint-button type="warning" icon="el-icon-edit" size="mini" title="修改spu"
                        @click="updateSpu(row)"></hint-button>
                     <hint-button type="info" icon="el-icon-info" size="mini" title="查看当前spu全部sku列表"
                        @click="handler(row)"></hint-button>
                     <el-popconfirm title="这是一段内容确定删除吗？" @onConfirm="deleteSpu(row)">
                        <hint-button type="danger" icon="el-icon-delete" size="mini" title="删除spu"
                           slot="reference"></hint-button>
                     </el-popconfirm>
                  </template>
               </el-table-column>
            </el-table>
            <!-- 分页器 -->
            <el-pagination style="text-align: center" :current-page="page" :page-sizes="[3, 5, 10]" :page-size="limit"
               @current-change="getSpuList" @size-change="handleSizeChange"
               layout="prev, pager, next, jumper,->, sizes,total" :total="total">
            </el-pagination>
         </div>
         <SpuForm v-show="scene == 1" @changeScene="changeScene" ref="spu"></SpuForm>
         <SkuForm v-show="scene == 2" ref="sku" @changeScenes="changeScenes"></SkuForm>
      </el-card>


      <el-dialog :title="`${spu.spuName}的sku列表`" :visible.sync="dialogTableVisible" :before-close="close">
         <!-- table展示sku列表-->
         <el-table :data="skuList" style="width: 100%" border v-loading="loading">
            <el-table-column prop="skuName" label="名称" width="width">
            </el-table-column>
            <el-table-column prop="price" label="价格" width="width">
            </el-table-column>
            <el-table-column prop="weight" label="重量" width="width">
            </el-table-column>
            <el-table-column label="默认图片" width="width">
               <template slot-scope="{row,$index}">
                  <img :src="row.skuDefaultImg" alt="" style="width:100px;height:100px;">
               </template>
            </el-table-column>
         </el-table>
      </el-dialog>
   </div>
</template>

<script>
import SpuForm from "./SpuForm";
import SkuForm from "./SkuForm";
export default {
   name:'Spu',
   data(){
      return {
         category1Id: "",
         category2Id: "",
         category3Id: "", 
         page: 1, //分页器当前第几页
         limit: 3, //每一页需要展示多少条数据
         records: [], //spu列表的数据
         total: 0, //分页器一共需要展示数据的条数
         scene: 0, //0代表展示SPU列表数据   1 添加SPU|修改SPU   2 添加SKU
         //控制对话框的显示与隐藏
         dialogTableVisible: false,
         spu: {},
         skuList: [], //SKU列表的数据
         loading:true
      }
   },
   methods:{
      //三级联动的自定义事件
      getCategoryId({ categoryId, level }) {
         //categoryId:获取到一、二、三级分类的id  level：为了区分是几级id
         if (level == 1) {
            this.category1Id = categoryId;
            //清除2、3级分类的id
            this.category2Id = "";
            this.category3Id = "";
         } else if (level == 2) {
            this.category2Id = categoryId;
            //清除3级id
            this.category3Id = "";
         } else {
            this.category3Id = categoryId;
            //获取SPU列表数据进行展示
            this.getSpuList();
         }
      },  
      //获取SPU列表数据的方法
      async getSpuList(pages = 1) {
            this.page = pages;
            const { page, limit, category3Id } = this;
            let result = await this.$API.spu.reqSpuList(page, limit, category3Id);
            if (result.code == 200) {
            this.total = result.data.total;
            this.records = result.data.records;
         }
      },
     //当分页器的某一个展示数据条数发生变化的回调
      handleSizeChange(limit) {
         //修改参数
         this.limit = limit;
         //再发请求
         this.getSpuList();
      },
      //添加SPU按钮的回调
      addSpu() {
         //切换为场景为1
         this.scene = 1;
         this.$refs.spu.addSpuData(this.category3Id);
      },
      //修改某一个SPU
      updateSpu(row) {
         this.scene = 1;
         //获取子组件SpuForm
         this.$refs.spu.initSpuData(row);
      },
      //删除SPU的回调
      async deleteSpu(row) {
            let result = await this.$API.spu.reqDeleteSpu(row.id);
            if (result.code == 200) {
            this.$message({ type: "success", message: "删除成功" });
            //代表SPU个数大于1删除的时候停留在当前页，如果SPU个数小于1 回到上一页
            this.getSpuList(this.records.length > 1 ? this.page : this.page - 1);
         }
      },
     //查看SKU的按钮的回调
      async handler(spu) {
         //点击这个按钮的时候，对话框可见的
         this.dialogTableVisible = true;
         //保存spu信息
         this.spu = spu;
         //获取sku列表的数据进行展示
         let result = await this.$API.spu.reqSkuList(spu.id);
         if (result.code == 200) {
            this.skuList = result.data;
            //loading隐藏
            this.loading = false;
         }
      },
      //关闭对话框的回调
      close(done){
         //loading属性再次变为真
         this.loading = true;
         //清除sku列表的数据
         this.skuList = [];
         //管理对话框
         done();
      },
      //自定义事件回调（SpuForm）
      changeScene({ scene, flag }) {
         //flag这个形参为了区分保存按钮是添加还是修改
         //切换结构（场景）
         this.scene = scene;
         //子组件通知父组件切换场景，需要再次获取SPU列表的数据进行展示
         if (flag == "修改") {
           this.getSpuList(this.page);
         } else {
           this.getSpuList();
         }
      },
      //SkuForm通知父组件修改场景
      changeScenes(scene) {
          this.scene = scene;
      },
     //添加SKU按钮的回调
      addSku(row) {
         console.log("row========>",row);
         //切换场景为2
         this.scene = 2;
         //父组件调用子组件的方法，让子组件发请求------三个请求
         this.$refs.sku.getData(this.category1Id, this.category2Id, row);
      },
   },
   components: {
    SpuForm,
    SkuForm,
  },
}
</script>

<style>

</style>